CN204809408U - Multifrequency section restructural cell -phone antenna - Google Patents

Abstract

The utility model discloses a multi-band reconfigurable mobile phone antenna. It includes a substrate, an antenna body, a radio frequency switch, and a metal grounding plate; the upper end of the substrate is provided with an antenna body, a radio frequency switch, and a metal grounding plate; the antenna body includes an impedance matching input transmission line, a U-shaped vertical strip, a T-shaped parallel strip, a rectangular parallel strip, Horizontal rectangular patch, vertical rectangular patch, U-shaped parallel strip, reverse L-shaped parallel strip, reverse L-shaped vertical strip, inverted L-shaped vertical strip, the RF switch is composed of switch one and switch two, and the inductor one works under the state of switch one , the inductor 2 works in the switch 2 state, the lower end of the radio frequency switch is connected with the upper end of the metal grounding plate; the bottom end of the metal grounding plate is connected with the bottom end of the substrate. The utility model has multiple frequency bands, reconfigurability, low loss, good radiation characteristics, low cost, small size, easy manufacture and integration, and is suitable for LTE/WWAN frequency bands.

Description

Multi-band reconfigurable mobile phone antenna

technical field

The utility model relates to an antenna, in particular to a multi-band reconfigurable mobile phone antenna.

Background technique

The antenna is an integral part of all wireless communication systems, responsible for converting the signal from the transmitter into electromagnetic waves for propagation to space, or converting electromagnetic signals in free space into high-frequency signals for receivers to receive, thereby Realize the space signal exchange process of wireless communication. With the continuous development of wireless communication technology and the continuous improvement of hardware research and development conditions, in order to better realize the transmission of wireless signals, higher requirements are placed on the performance of antennas. In today's environment where wireless communication equipment is widely used , the importance of antennas is increasing day by day, and the research on various antenna technologies and the requirements for higher technical indicators make antenna technology usher in another major opportunity for development.

Modern wireless communication devices are required to be as small as possible and cover as many frequency bands as possible to achieve more functions. However, for mobile phone embedded antennas, the size is very large in a limited space, which is undoubtedly a big challenge for antenna designers. One way to cover multiple frequency bands is to use reconfigurable antennas. This technology is very advantageous in terms of antenna weight, volume, and performance, so it is also very popular. Many switching technologies, especially RF switches, are gaining more and more attention from antenna engineers.

Contents of the invention

The utility model provides a multi-band reconfigurable mobile phone antenna, and the technical scheme is as follows:

The multi-band reconfigurable mobile phone antenna includes a substrate, an antenna body, a radio frequency switch, and a metal grounding plate; the upper end of the substrate is provided with an antenna body, a radio frequency switch, and a metal grounding plate; the antenna body includes an impedance matching input transmission line, a U-shaped vertical strip, and a T-shaped parallel Tape, rectangular parallel strip, horizontal rectangular patch, vertical rectangular patch, U-shaped parallel strip, inverted L-shaped parallel strip, inverted L-shaped vertical strip, inverted L-shaped vertical strip, impedance-matching the upper end of the input transmission line to the U-shaped vertical strip The lower left end of the U-shaped vertical strip is vertically connected, the U-shaped vertical strip opens upwards, and is perpendicular to the substrate, the upper left end of the U-shaped vertical strip is vertically connected with the upper left end of the T-shaped parallel strip, and the T-shaped parallel strip extends forward along the direction of the metal grounding plate , the upper left end of the rectangular parallel strip is connected to the lower end of the T-shaped parallel strip, the lower end of the horizontal rectangular patch is connected to the upper end of the RF switch, the upper end of the horizontal rectangular patch is vertically connected to the lower end of the vertical rectangular patch, and the vertical rectangular patch is vertical Extending upward on the substrate, the upper left end of the U-shaped parallel strip is vertically connected to the upper end of the vertical rectangular patch, the U-shaped parallel strip extends forward along the direction of the metal ground plate, and the left end of the reverse L-shaped parallel strip is connected to the U-shaped parallel strip. The lower right end is connected, the upper right end of the inverted L-shaped parallel strip is vertically connected with the inverted L-shaped vertical strip, the upper left end of the inverted L-shaped vertical strip is connected with the lower left end of the inverted L-shaped vertical strip, and the radio frequency switch is composed of switch one and switch two. Inductor 1 works in switch 1 state, inductance 2 works in switch 2 state, the lower end of the radio frequency switch is connected with the upper end of the metal grounding plate; the bottom end of the metal grounding plate is connected with the bottom end of the substrate.

The substrate is made of glass fiber epoxy resin material, the length of the substrate is 130mm-140mm, the width is 60mm-70mm, and the thickness is 0.8mm-1mm. The length of the impedance matching input transmission line in the antenna main body is 8mm-9mm, and the width is 2mm-2.2mm. The total length of the U-shaped vertical strip is 30mm-32mm, the total height is 6mm-6.5mm, the patch width is 2mm-2.2mm, the length of the T-shaped parallel strip horizontal rectangular patch is 15mm-16mm, and the width is 1mm-1.2mm , the length of the longitudinal rectangular patch is 5.3mm-5.8mm, the width is 2mm-2.2mm, the length of the rectangular parallel strip is 13mm-14mm, the width is 1mm-1.2mm, the length of the horizontal rectangular patch is 8mm-9mm, the width The height of the vertical rectangular patch is 6mm～6.5mm, the width is 2mm～2.2mm, the total length of the U-shaped parallel strip is 42mm～44mm, the total width is 10mm～11mm, and the patch width is 2mm～ 2.2mm, the total length of the inverted L-shaped parallel strips is 16mm to 17mm, the total width is 10mm to 12mm, the patch width is 2mm to 2.2mm, the total length of the reverse L-shaped vertical strips is 14mm to 15mm, and the total height is 6mm to 6.5mm, the patch width is 2mm-2.2mm, the total length of the inverted L-shaped vertical belt is 4mm-4.5mm, the total height is 4mm-4.5mm, and the patch width is 2mm-2.2mm. The inductance value of the first inductor in the radio frequency switch is 9nH-9.2nH, and the inductance value of the second inductor is 50nH-51nH. The metal grounding plate has a length of 120mm-130mm and a width of 60mm-70mm.

The utility model has the advantages of multiple frequency bands, reconfigurability, low loss, good radiation characteristics, low cost, small size, easy manufacture and integration.

Description of drawings

Figure 1 is an overall structural diagram of a multi-band reconfigurable mobile phone antenna;

Fig. 2 is a structural diagram of the antenna main body of the multi-band reconfigurable mobile phone antenna;

Figure 3 is a return loss diagram of a multi-band reconfigurable mobile phone antenna;

Figure 4 is the radiation pattern of the xy plane, xz plane, and yz plane when the antenna is in the first switch state at 0.85 GHz;

Figure 5 is the radiation pattern of the xy plane, xz plane, and yz plane when the antenna is in the switch one state at 1.86 GHz;

Figure 6 is the radiation pattern of the xy plane, xz plane, and yz plane when the antenna is in the second state of the switch at 0.74 GHz;

Figure 7 is the radiation pattern of the xy plane, xz plane, and yz plane when the antenna is in the switch state of 1.43 GHz

Figure 8 is the radiation pattern of the xy plane, xz plane and yz plane when the antenna is in the second state of the switch at 1.91 GHz;

Fig. 9 is the radiation pattern diagram of the xy plane, xz plane and yz plane when the antenna is in the switch 2 state at 2.47 GHz.

Detailed ways

As shown in Figures 1 and 2, the multi-band reconfigurable mobile phone antenna includes a substrate 1, an antenna body 2, a radio frequency switch 3, and a metal ground plate 4; the upper end of the substrate 1 is provided with an antenna body 2, a radio frequency switch 3, and a metal ground plate 4 ;Antenna main body 2 includes impedance matching input transmission line 5, U-shaped vertical strip 6, T-shaped parallel strip 7, rectangular parallel strip 8, horizontal rectangular patch 9, vertical rectangular patch 10, U-shaped parallel strip 11, reverse L-shaped parallel strip Strip 12, inverted L-shaped vertical strip 13, inverted L-shaped vertical strip 14, the upper end of the impedance matching input transmission line 5 is vertically connected to the lower left end of the U-shaped vertical strip 6, and the opening of the U-shaped vertical strip 6 faces upwards, perpendicular to the substrate 1, The upper left end of the U-shaped vertical strip 6 is vertically connected to the upper left end of the T-shaped parallel strip 7, and the T-shaped parallel strip 7 extends forward along the direction of the metal ground plate 4, and the upper left end of the rectangular parallel strip 8 is connected to the T-shaped parallel strip 7 The lower end of the horizontal rectangular patch 9 is connected to the upper end of the radio frequency switch 3, the upper end of the horizontal rectangular patch 9 is vertically connected to the lower end of the vertical rectangular patch 10, and the vertical rectangular patch 10 extends upward perpendicular to the substrate 1, U The left upper end of the parallel strip 11 is vertically connected to the upper end of the vertical rectangular patch 10, the U-shaped parallel strip 11 extends forward along the direction of the metal ground plate 4, and the left end of the reverse L-shaped parallel strip 12 is connected to the U-shaped parallel strip 11. The lower right end is connected, the upper right end of the reverse L-shaped parallel band 12 is vertically connected with the reverse L-shaped vertical band 13, the left upper end of the reverse L-shaped vertical band 13 is connected with the left lower end of the inverted L-shaped vertical band 14, and the radio frequency switch 3 is controlled by a switch Composed with switch two, the inductor one works in the switch one state, and the inductor two works in the switch two state, the lower end of the radio frequency switch 3 is connected to the upper end of the metal ground plate 4; the bottom end of the metal ground plate 4 is connected to the bottom end of the substrate 1.

The substrate 1 is made of glass fiber epoxy resin material, the length of the substrate 1 is 130mm-140mm, the width is 60mm-70mm, and the thickness is 0.8mm-1mm. The length of the impedance-matched input transmission line 5 in the antenna main body 2 is 8mm-9mm, and the width is 2mm-2.2mm. The total length of the U-shaped vertical belt 6 is 30mm-32mm, the total height is 6mm-6.5mm, the patch width is 2mm-2.2mm, the length of the T-shaped parallel belt 7 is 15mm-16mm, and the width is 1mm- 1.2mm, the length of the vertical rectangular patch is 5.3mm-5.8mm, the width is 2mm-2.2mm, the length of the rectangular parallel strip 8 is 13mm-14mm, the width is 1mm-1.2mm, and the length of the horizontal rectangular patch 9 is 8mm ～9mm, width 2mm～2.2mm, height of vertical rectangular patch 10 is 6mm～6.5mm, width 2mm～2.2mm, total length of U-shaped parallel belt 11 is 42mm～44mm, total width is 10mm～11mm, The patch width is 2mm-2.2mm, the total length of the reverse L-shaped parallel belt 12 is 16mm-17mm, the total width is 10mm-12mm, the patch width is 2mm-2.2mm, and the total length of the reverse L-shaped vertical belt 13 is 14mm ～15mm, the total height is 6mm～6.5mm, the patch width is 2mm～2.2mm, the total length of the inverted L-shaped vertical belt 14 is 4mm～4.5mm, the total height is 4mm～4.5mm, the patch width is 2mm～2.2mm mm. The inductance value of the first inductor in the RF switch 3 is 9nH-9.2nH, and the inductance value of the second inductor is 50nH-51nH. The metal grounding plate 4 has a length of 120mm-130mm and a width of 60mm-70mm.

Example 1

Multi-band reconfigurable mobile phone antenna:

The substrate is a glass fiber epoxy resin material with a dielectric constant of 4.4, the length of the substrate is 130mm, the width is 60mm, and the thickness is 0.8mm. The impedance-matched input transmission line in the antenna body has a length of 8mm and a width of 2mm. The total length of the U-shaped vertical strip is 30mm, the total height is 6mm, and the patch width is 2mm, the length of the T-shaped parallel strip horizontal rectangular patch is 15mm, and the width is 1mm, and the length of the vertical rectangular patch is 5.3mm. 2mm, the length of the rectangular parallel strip is 13mm, the width is 1mm, the length of the horizontal rectangular patch is 8mm, the width is 2mm, the height of the vertical rectangular patch is 6mm, the width is 2mm, the total length of the U-shaped parallel strip is 42mm, The total width is 10mm, the patch width is 2mm, the total length of the reverse L-shaped parallel strip is 16mm, the total width is 10mm, the patch width is 2mm, the total length of the reverse L-shaped vertical strip is 14mm, and the total height is 6mm. The patch width is 2mm, the total length of the inverted L-shaped vertical strip is 4mm, the total height is 4mm, and the patch width is 2mm. The inductance value of inductor 1 in the RF switch is 9nH, and the inductance value of inductor 2 is 50nH. The metal ground plate has a length of 120mm and a width of 60mm. Various performance indicators of the multi-band reconfigurable mobile phone antenna are simulated using HFSS software, and the return loss curve obtained is shown in Figure 3. It can be seen from the figure that the working frequency bands below -6dB are 0.69GHz~0.985GHz, 1.395GHz~1.475GHz, 1.69GHz~2.17GHz, and 2.417GHz~2.56GHz. Figure 4 shows the radiation patterns of the xy plane, xz plane, and yz plane when the antenna is in the switching state of 0.85 GHz. It can be seen from the figure that the gain is 1.846 dBi when the frequency is 0.85 GHz. Figure 5 shows the radiation patterns of the xy plane, xz plane, and yz plane when the antenna is in the switching state of 1.86 GHz. It can be seen from the figure that when the frequency is 1.86 GHz, the gain is 2.37 dBi. Figure 6 shows the radiation patterns of the xy plane, xz plane, and yz plane when the antenna is in the switching state of 0.74GHz. It can be seen from the figure that the gain is 1.769dBi when the frequency is 0.74GHz. Figure 7 shows the radiation patterns of the xy plane, xz plane, and yz plane when the antenna is in the switching state of 1.43GHz. It can be seen from the figure that the gain is 2.46dBi when the frequency is 1.43GHz. Figure 8 shows the radiation patterns of the xy plane, xz plane, and yz plane when the antenna is in the switching state of 1.91GHz. It can be seen from the figure that the gain is 2.558dBi when the frequency is 1.91GHz. Figure 9 shows the radiation patterns of the xy plane, xz plane, and yz plane when the antenna is in the switching state of 2.47 GHz. It can be seen from the figure that the gain is 4.25 dBi when the frequency is 2.47 GHz.

Claims (5)

1. a multiband reconfigurable mobile phone antenna, is characterized in that comprising substrate (1), antenna body (2), radio-frequency (RF) switch (3), metal ground plate (4), substrate (1) upper end is provided with antenna body (2), radio-frequency (RF) switch (3), metal ground plate (4), antenna body (2) comprises impedance matching input transmission line (5), U-shaped belt (6), T-shaped parallel band (7), rectangular parallel band (8), horizontal rectangular paster (9), vertical rectangle paster (10), U-shaped parallel band (11), backward L-shaped parallel band (12), backward L-shaped belt (13), inverted L-shaped belt (14), the upper end of impedance matching input transmission line (5) is connected with the lower-left end of U-shaped belt (6) is vertical, U-shaped belt (6) is opening up, vertical with substrate (1), the left upper end of U-shaped belt (6) is connected with the left upper end of T-shaped parallel band (7) is vertical, T-shaped parallel band (7) extends forward along the direction of metal ground plate (4), the left upper end of rectangular parallel band (8) is connected with the lower end of T-shaped parallel band (7), the lower end of horizontal rectangular paster (9) is connected with the upper end of radio-frequency (RF) switch (3), the upper end of horizontal rectangular paster (9) is connected with the lower end of vertical rectangle paster (10) is vertical, vertical rectangle paster (10) upwards extends perpendicular to substrate (1), the left upper end of U-shaped parallel band (11) is connected with the upper end of vertical rectangle paster (10) is vertical, U-shaped parallel band (11) extends forward along the direction of metal ground plate (4), the left end of backward L-shaped parallel band (12) is connected with the bottom righthand side of U-shaped parallel band (11), the upper right side of backward L-shaped parallel band (12) is connected with backward L-shaped belt (13) is vertical, the left upper end of backward L-shaped belt (13) is connected with the lower-left end of inverted L-shaped belt (14), radio-frequency (RF) switch (3) is made up of switch one and switch two, under switch one state, inductance one works, under switch two-state, inductance two works, the lower end of radio-frequency (RF) switch (3) is connected with the upper end of metal ground plate (4), the bottom of metal ground plate (4) is connected with the bottom of substrate (1).

2. a kind of multiband reconfigurable mobile phone antenna as claimed in claim 1, it is characterized in that described substrate (1) is glass-epoxy material, the length of substrate (1) is 130mm ~ 140mm, and width is 60mm ~ 70mm, and thickness is 0.8mm ~ 1mm.

3. a kind of multiband reconfigurable mobile phone antenna as claimed in claim 1, it is characterized in that described antenna body (2) middle impedance mates the length inputting transmission line (5) is 8mm ~ 9mm, width is 2mm ~ 2.2mm, the total length of U-shaped belt (6) is 30mm ~ 32mm, total height is 6mm ~ 6.5mm, patch width is 2mm ~ 2.2mm, the length of T-shaped parallel band (7) horizontal rectangular patch is 15mm ~ 16mm, width is 1mm ~ 1.2mm, the length of longitudinal rectangular patch is 5.3mm ~ 5.8mm, width is 2mm ~ 2.2mm, the length of rectangular parallel band (8) is 13mm ~ 14mm, width is 1mm ~ 1.2mm, the length of horizontal rectangular paster (9) is 8mm ~ 9mm, width is 2mm ~ 2.2mm, the height of vertical rectangle paster (10) is 6mm ~ 6.5mm, width is 2mm ~ 2.2mm, the total length of U-shaped parallel band (11) is 42mm ~ 44mm, overall width is 10mm ~ 11mm, patch width is 2mm ~ 2.2mm, the total length of backward L-shaped parallel band (12) is 16mm ~ 17mm, overall width is 10mm ~ 12mm, patch width is 2mm ~ 2.2mm, the total length of backward L-shaped belt (13) is 14mm ~ 15mm, total height is 6mm ~ 6.5mm, patch width is 2mm ~ 2.2mm, the total length of inverted L-shaped belt (14) is 4mm ~ 4.5mm, total height is 4mm ~ 4.5mm, patch width is 2mm ~ 2.2mm.

4. a kind of multiband reconfigurable mobile phone antenna as claimed in claim 1, it is characterized in that the inductance value of inductance one in described radio-frequency (RF) switch (3) is 9nH ~ 9.2nH, the inductance value of inductance two is 50nH ~ 51nH.

5. a kind of multiband reconfigurable mobile phone antenna as claimed in claim 1, it is characterized in that the length of described metal ground plate (4) is 120mm ~ 130mm, width is 60mm ~ 70mm.